PI 2 Design Pi 2 Media PI2AES, Hardware Reference Manual

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PI2Media PI2AES
Hardware Reference Manual – P0.1 - 3/27/2019
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6 6
6 PI2AES
PI2AES PI2AES
PI2AES POWER
POWER POWER
POWER
6.1 OVERVIEW
The PI2AES is designed to be powered from an ex12V to +48V source. Jumper
W2, when installed, allows the Raspberry PI to be powered from the PI2AES. When
jumper W2 is removed, separate 5V power must be supplied to the Raspberry PI.
Note that an on-board protection circuit insures proper operation when jumper W2 is
installed while power is applied via J1 AND from the Pi (P1) simultaneously.
See the below block diagram for a simplified view of the PI2AES power.
TPS54560, 5V @ 5A
SWITCHING REGULATOR
J1
2.5MM JACK
RESETABLE
POLY FUSE
+12V to +48V
DC INPUT
58V
OVER PROTECTION
AP1155, 3.3V
LOW NOISE LDO
ADP150, 3.3V
LOW NOISE LDO
+3.3V to Digital Logic
+3.3V to NDK CLOCKS
BIDIRECTIONAL
POWER
PROTECTION
RASPBERRY PI
40-PIN HDR
5V PINS
W2
EXPANSION
HEADER POWER PINS
PI2AES POWER FLOW
SIMPLIFIED BLOCK DIAGRAM
W1
+5V to HDMI Connector
Figure 2 – PI2AES Power, Simplified Block Diagram